Apparatus for electrochemical analysis.



No. 870,674. 'PATENTED NOV. 12, 1907. e. A. emsss & H. E..T. HAULTAIN.

. APPARATUS FOR ELECTROCHEMICAL ANALYSIS.

" APPLICATION FILED APR.26.1905.

IW i'GD'S? mug} aim D490 UNI sTAmEs PATENT OFFICE.

GEORGE A. GUESS, OF SILVERTON, COLORADO, rmnfnnftsnn r 'r. HAULTAIN, OF NELSON,

.- BRITISH COLUMBIA, CANADA.

APPARATUS FOR ELECTROCHEMICAL ANALYSIS.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed April 26. 1905- Serial No. 257.540-

To all whom it may concern:

Be it known that we, Gnonon A. Guess, a subject of the-King of Great Britain, residing at Silver-ton, .in the county of San Juan and State of Coloradoyand Hnnnnn'r '1. HAULTAIN, a subject of the King of Great Britain, "residing at Nelson, in the county of Kootenay,

- British Columbia, Canada, have invented a certain new and useful Improvement in Apparatus for Electrochemical Analysis, of which the following is a full, clear, and exact description.

The object of this invention is to provide a compact and conveniently arranged apparatus, especially designed for electrolytic assaying.

' The invention comprises a bench of adjustable vention, in the several figures of'which like parts are similarly designated, Figure 1 is a perspective view of the apparatus. Fig. 2 is a bottom plan view of a portion of the bench and showing one means for clamping the beaker stands in position. Figs. 3, 4 and 5 are diagrams of various arrangements of circuits.

1 is a horizontal bench, having any number of holes in which are placed the shanks 2 of a series of beaker stands 3. These stands may be supported in any given position above the bench, as indicated by the stand A Fig. 1, by means oi ,a suitable clamp or other holding device, such as an eccentric or cam 4, Fig. 2.

Above the bench and in a suitable support 5 are arranged the terminals 6. These terminals are, preferably, cylinders of aluminium of suitable length, and

-have their ends 7 slitted longitudinally. The termi- I Thebeaker 10 having been supplied with the electrolyte or fluid to be analyzed or treated, it is placed upon one. of the stands 3 and raised so as to submerge the blades of the electrodes, and the'current is then tum ed on. As many beakers may be arranged upon the bench as there are sets of terminals, and independan. operations carried on in all of them.

As shown in Fig. theterminals are wired up for .running assaysin series, and in this case the central terminal supports the cathode, for receiving metallic deposit, as in copper, nickel, or zinc assays. 7

As shown in Fig. 4, the wiring is arranged for assays in series, but the central terminal supports an anode for receiving peroxid deposit, asin lead or manganese assays.

As shown in Fig. 5, the wiring is arranged for the introduction of a shunt resistance across the terminals before removing the electrolyte. A pair of plates 11 is interposed in the circuit to receive a metal plug, not shown, and in the circuit also is arranged the resistance coil or device 12.

Any one of the assays orbcakers may be short-circuited in order to remove the electrolyte and Without cutting off the current from the other sets, by introducing between the terminals a hollow thimble 13 of aluminium Oi otherconductor; and as already indicated by reference to Fig. 5, the shunt rcsistapce may be introduced for the same purpose. I

The short-cir'cuiting with a thimble or other hollow or solid resistance, fixed or variable, is an important feature inthe apparatus. The fixed resistance keeps the current and theremaining assays approximately constant while some assays are being removed; and the variable resistance permits a variation of the current flowing through any assay without seriously affecting the rest oi the assays. The fixed shunt resistance pref erably is approximately of a resistance toabsorb the same number of volts as the assay.

14 is a rail conveniently located above the bench to This with heavy deposits tends to lessen the tendency of such to peel off, and consequently permits the use of a smaller area to hold to same quantity of deposit. The combination of slit terminals in lieu of ordinary screw binding posts, with frictionally engaged electrodes of very tliin material, permits the ready and rapid connection and disconnection of the parts, without appreciable abrasion, and gives better contact, particularly after being in use iorsome time; and the terminals being of aluminium are not tarnished or Otherwise attacked in juriously by acid fumes, and hence the surface and electrical contact is good working order.

What we claimis:-

1. An electro-chemical apparatus, comprising the comblnation of three terminals in a set, slit longitudinally, and an independent electrode arranged in the slit of each always preserved in l the middle terminal adapted to receive the deposit and the several termlnalsconnected upln circuit.

2. An electrochemical apparatus, comprising a bench,

a series of beaker supports adjustable therein, anti a series of terminuls'm'el each beaker supper, and electrical onnections for the terminals.

3. An electro-chenflcal apparatus, comprising slit 1:61" minals arranged in sets of three, an independent electrode applied frictibnully 'in the slit of each of said terminals, means for connecting 1110 several terminals in series, and means for short-circuiting any one Ql' more of the sets of terminals. I

4. An electrochemical apparatus, comprising aluminium terminals, slitlongitudinally And each adapted to receive svmsm and hold an inflependenteiectrode by frictional engagement in, its slit, means for connecting the terminals in circuit, and a tlximble adapted to be interposed between the terminals for short-circuitiug purposes.

In testimbny whereof We have hareunto set our. hands this 20th day of April A. D. 1905 GEO.'A GUESS.

HERBERT E; T. HAULTAIN.

Witnesses WILLIAM N. Smncrr. WM. A. WAY. 

